Collapsible core.



11,;5; BOYD &'R. B. KOONTZ.

GOLLAPSIBLE CORE. 'A PPLI'OA TIUN FILED MAY 26,1913.

- "Patented Apr. 14, 1914.

1 Suva/tow l I "WTtr w tritium *4 t HARRY E, BGYID, 6F AKBENQ AND B. KOGNTZ, 31 SPRINGFIELD TOWNSHIP,

CULLAFEIBLE 530E155.

Specification of Letters Itatent.

itp ilioation filed h'lay 1'26, 1913. Serial No 2 69,9525.

To all whom it may concern Be it known that we, HARRY E.- lBOYn and RUSSELL B. KQONTZ, citizens of the United itates, residing at Akron and Springfield. \;-ownship,' respectiveiy in the county of Summit and State of Ohio, lave invented new and useful Improvements in Coll-up s ble Cores, of which the following is a specification.

This invention relates generally to improvements in. collapsible cores for menu featuring the outer shoes of double-tuhe pneum'atic tires, and the object thereof to provide a collapsible core which may he quickly assembled or collapsed, the inve1ition contemplating the provision of plurality of.segments, whu:li, when united, will.

form an annular core-body for imparting to the interior of the tire-shoe (luring thoniuiur feature thereof, the proper shape to receive the inner inflatable tube, the invention more particularly residing in the means whereby the various segments constituting the body portion of the core, are temporarily united.

More specifically, the invention resides in providing the abutting ends of the men shaped. members with registering rociialiyentending notches so that when the ends of the segment-shaped members are abiiitted radiai openings are formed; por trons of the openings being in each of the abutting ends. In order to unite, the mentshaped members of which the core is formediuto an animlar body there is secured in the notches in the and of each segment (L radially--extoncling member and also provided inter-engaging members in the no operating ends of contiguous numbers, the members mounted on abutting segmentshapecl members arranged to eoiiperute for assisting in. holding the segment-striped sen:- tions in annular fornuttiou, the inner ends of a portion of the members projectingiii-- wardly beyond the inner izuzes of the tizmges forming portions of the core body. These projecting ends: are threaded to. receive Washer members having inclined faces and also to receive clumping nuts. The inner feces of the flanges surrouurlii the projecting inner ends of the members being pro-- "ruled with shuiiow grooves having inclined Wa ls cooperating with the inclined. Walk of the washer members so that when the nuts are drawn up the inclined. Witilfi of the washer members will engage the inclined wells of the concei'uric grooves and force the abutting ends of contiguous segmentsliaped sections into snug engagement with each o-th er. I

With the foregoing and other objects in View, the invent .on consistsin the novel coin.- struetion, combination and arrangement of parts constituting the intention to he hereinafter specifically described and iiiustruted in the accompanying drawings which form a; part hereot wherein in unowu the preferred embodiment of tho iumutiim, but it is to he unilcrutootl thut change vuriutious mul nuuilifimtious can he resorted to which some within the scope of the chums hereunto uppended.

in the drawings in their similar reference runner-ails inc licute liho'pzirts in the (liftoront figures Figure i is u plan view of u ring; core umh-z lying this invention; iiig it. is; u iongittuiiuui central s ed'iuuul the abutting; ends ot' two segu'mntpurl. members; showing the menus empiuyeu for uniting them in annular jtoruuuiou; and Fig. 3, is u plan view of the elements shown in hi2. 2.

The ring core is constructed of it plurality of segmentshaped members which when united tog-ether as hereinafter" desurihcih constitute an annulus the outer face of which is :ulupml to impart u desirml 'cuniigurution to the inner Suieuro of the tire sh e inmuihu-i:uml thereon. those segments are designated in the drawings by the reference uumerulj I. 25 and il. Tihcezu vnriouu segment-sh211ml members are pre't omhly made hollow to reihure the weight of the. finished core and the mule nt' ouch 1uint-uhupmi luumhrrs are closed so as to promut u sumoth st no and (:tltll at the srrtious is further pruvidml with an in 7:1filly-extending flange in unit-1' to simplify the tlceeriptiou it muy be shite-(l thut the tQiiipUlttY imp; mt-nu: employed for writing the various segments together is common to all and hence, a description of one joint or coupling means employed for uniting two segmentshaped members together is deemed suiticient for a full understanding of the invention, and in order to illustrate this more fully, the description will be more particularly directed to the joint or coupling instrumentality employed between the segments 2 and 4.

The end of the segment-shaped member 2 is provided with aradially-extending notch or groove 6 in which is positioned a radial member 7 secured to the end of the member 2 through the medium of hold-fast devices 8. The outer portion 9 of this member 7 is arranged to extend longitudinally'into a registerinc recess 12 formed in the mem her 4; and thereby constitute a key for preventing the transverse disarrangement of the sections with respect to each other. The head portion 9 is provided with an inclined inner face 11 for a purpose to be stated. Se- .cured in the radial opening 12 in the end of the member 4: which coiiperates with the end of the member 2 is a radially-extending element secured in position through the medium of hold-fast devices 14. The. outer end of this element 18 is inclined to cooperate with the face 11 of the head 9 of the member 7. The inner end of the member 7 is cylindrical. and threaded at 15 and projects inwardly beyond the inner faces of the flanges 9'of the members 2 and 1. Prof erably concentric with the threaded portion 15 of the member 7 is an annular groove 16 the inner face 17 of which is inclined. Mounted on the threaded portion 15 of the member 7 is a cup-shaped washer member 18 the inner face 19 of which is inclined and arranged to engage the inclined face 17 of the registering grooves in 16 and the sections 2 and 4 and set up a wedging action when forced inwardly for drawing the ends of contiguous segments toward each other into snug engagement. The washer member 18 is forced outwardly through the medium of a nut 20.

When the core is set up the various segment-shaped members 1, 2, 3 and 4c are arranged in annular formation with the ends thereof abutting and with the inclined outer faces of the members 13 interlocking against the inclined faces 11 of the members 7 which prevent the outward movement of the ends of the segment-shaped sections. In order to lock the sections detachably in annular formation the cup-shaped washer members 18 are applied to the threaded portions 15 of the members 7 and are forced outwardly through the medium of nuts 20, in doing which the wedging action set up by the engagement of the inner face 19 of the washer 18 with the walls 17 of the sections tends to oasdos force the ends of-the sections together and as the heads 9 of the members 7 extend longitudinally into the recesses 12 of the oooperating or coadjacent ends of the contiguv ous sections any lateral movement of the sections with respect to each other is prevented. The core is dismounted after use by removing the nuts 20 on the members 7 which are positioned in the ends of the segment-shaped members 1 and 3 and after the washer members have been removed the segment-she ed section 1 which constitutes a key mem or may be moved inwardly thereby permitting the removal of the other sections successively. The core is reassembled by reversing the foregoing operation.

Weclaim:

1. In a collapsiblecore for the manufacture of tire shoes, the combination of a series of segment-shaped sections adapted to be assembled into a circular core, the ends of the sections abutting against each other and each formed with an inwardlyextending flange, the opposing ends of the sections being provided with registering radially-extending notches radially-extending members mount-' ed in each of said notches and fashioned to permit the members on the opposing ends of contiguous sections to interengage, one of the members on each section pro ecting ra-' dially and inwardly beyond the flange of its section, the abutting flanges surrounding said projecting portion provided with annular grooves spaced from said notches having inclined faces, and washer members provided with inclined faces for cotiperating with inclined faces of said grooves applied to said projecting ends. and means for shifting said washer members to bring the inclined faces into coiiperation for forcing the contiguous ends of sections together.

'2. In acollapsible core for the manufacture of tire shoes, the combination of a series of segment-shaped sections adapted to be assembled into a circular core, the ends of the sections abutting against each other and each formed with an inwardly-extending flange, the opposing ends of the sections being provided with registering radiallyextending notches arranged when said sections are abutted to form radial openings, locking members mounted in the grooves at one end of each section and arranged to project into the groove in a contiguous section, coiiperating members in the grooves in the ends of the other sections adapted to interengage with said first members, a portion of said members extending inwardly and provided with threaded shanks, the inner faces of the flanges surrounding said threaded members provided with annular grooves havin inclined faces, washer members having inclined faces for engagement with th inclined faces of said grooves applied to said i'eefled 'men'nbers, and nuts on said threaiset our hands in presence of two subscribe; members for shifting said Washermereing Witnesses. 1ers outwmily tn bring 'the inclined faces HABRYE. BOYD. 01 the washer members and grooves into en' RUSSELL B. KOONTZ. gugement for forcing the ends of the secions int-0 snug engagement.

In testimony whereof We have hereunto Witnesses:

G. E. HUMPHREY,

A. L. McCL'IN'rooK. 

